What is Rotational Moulding?

Rotational Moulding, which is often known as “Rotomoulding”, is a form of plastics manufacturing that offers a number of significant advantages over other ways in which manufacturers mould plastics.

In Rotomoulding, plastic is injected into a hollow mould (think of it as a empty shell), and then rotated a full 360 degrees at a low speed as the plastic is heated. The end effect is that as the plastic melts it coats the inner lining of the mould and sticks to the surface. It is then cooled and the rotation is stopped so that the finalised product can be removed from the mould.

This form of manufacturing is cost-effective and allows for a great deal of aesthetic creativity.

The end product has lower levels of residual stresses when compared to other forms of plastics manufacturing and the moulds can be developed by Rotadyne's Designers and produced at a low cost. With 40 years developing advanced Rotational Moulding techniques, Rotadyne can create products of virtually any shape or size, including complex parts and intricate designs, while ensuring strong, uniform wall thickness and numerous benefits over other types of materials like aluminium, steel, and wood.

Rotational moulding is also ideal for products that involve large footprints. Products such as water and chemical tanks are best produced through rotational moulding. Other popular applications for Rotomoulding can be found in prototyping, and industry verticals including military, medicine, mining, production, packaging, advertising, and outdoor sports and recreation have all discovered the value of partnering with a strong Rotomoulding manufacturer.

Rotadyne is a leader in Rotomoulding, and was one of the founding pioneers of the industry. A founding member of the Association of Rotational Molders Australasia, Rotadyne has the experience and the team that is capable of leveraging the unique strengths of this style of manufacturing to the benefit of your business. The Rotadyne team can guide customers through the entire process from initial project assesment through high level design, ROI analysis, creation of detailed drawings, tooling estimates, draft design, tooling manufacturing, initial production run, product testing, full production run, post project debrief and final assesment.

Be sure to consider Rotomoulding if you need:

• A hollow part that can be made in one piece with no weld lines or joints

• An end product that is essentially stress-free

• Molds are relatively inexpensive

• A short lead time for the manufacture of a mold

• A short production run that is economically viable

• No material wastage and a guarantee that all of the material is normally consumed in making the part

• Multilayer products

• Different types of product that can be molded together on the one machine

• Inserts, which are easy to mold in with Rotomoulding

• High quality graphics for an aesthetic effect

• Special material effect. Rotomoulding is ideal for building products that feature flame retardancy, electrical conductivity or thermal insulation


Rotadyne Pty Ltd

ABN 21 077 570 784

31-43 Power Street

St Marys NSW 2760



Tel. 1800 251 663

Fax. +61 2 9623 6810